The GRAV� Wide-Based Water Pipe is 8" tall and made on 32mm tubing. Its downstem ends in a wide conical fission perc that diffuses smoke through water and is fixed inside the pipe to prevent damage. The narrow tube leading to the mouthpiece prevents splashback. The wide-based water pipe comes ready to use with a 14mm GRAV� Cup Bowl and functions best with approximately 1" of water.